\name{backtrans}
\alias{backtrans}

\title{Back-transform Columns in a Data Frame}
\description{
 Exponentiate presumably log-transformed columns in a data frame.
}
\usage{
backtrans(x, cols)
}

\arguments{
  \item{x}{ data.frame }
  \item{cols}{vector of column names }
}
\value{data.frame}
\references{mifuns.google.code.com}
\author{Tim Bergsma}
\seealso{ \code{\link{PLOTR}} }


\keyword{manip}

